Ken Griffin’s Mediaco Holding MDIA Stock Holding History

Ken Griffin’s Portfolio MDIA Stock Details MDIA Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-32,354	Closed	-$41.1K	–	13513
2025 Q3	$41.1K	Buy	+32,354	New	+$42.3K	﹤0.01%	12283
2025 Q2	–	Sell	-44,171	Closed	-$50.4K	–	14040
2025 Q1	$50.4K	Buy	+44,171	New	+$50.1K	﹤0.01%	12307
2024 Q2	–	Sell	-12,403	Closed	-$6.46K	–	14965
2024 Q1	$6.46K	Buy	+12,403	New	+$6.57K	﹤0.01%	13669
2021 Q2	–	Sell	-22,220	Closed	-$73K	–	14091
2021 Q1	$73K	Buy	+22,220	New	+$76.4K	﹤0.01%	12709

Other funds holding MDIA

Standard General New York $336M AUM 16.52% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return

TRCT

Tower Research Capital (TRC) New York $4.08B AUM 58.77% 1-Year Est. Return

Ken Griffin's MDIA Position: Q4 2025 in Review

Ken Griffin sold out of Mediaco Holding (MDIA) in Q4 2025, closing a stake of 32,354 shares — an estimated $41.1K sold.

Ken Griffin first reported a position in MDIA in Q1 2021 and held it in 4 quarters. The position peaked at $73K in Q1 2021. 14 funds tracked by Wall St. Rank hold MDIA as of Q4 2025.

Ken Griffin reported no remaining Mediaco Holding position as of Q4 2025 after selling out during the quarter.
Ken Griffin sold 32,354 Mediaco Holding shares in Q4 2025, an estimated $41.1K.
Ken Griffin first reported a position in Mediaco Holding in Q1 2021 and held it in 4 quarters.
Ken Griffin's Mediaco Holding position peaked at $73K in Q1 2021.
14 funds tracked by Wall St. Rank held Mediaco Holding as of Q4 2025.

Based on Citadel Advisors's 13F filing for Q4 2025, filed 17 Feb 2026.